What is Bob Ewell's attitude as he takes the stand and testifies (use words from the text)?

Mr. Ewell looks like a cocky little rooster getting his ten minutes of fame. He tries to make a joke in front of the court:

“Are you the father of Mayella Ewell?” was the next question.

“Well, if I ain’t I can’t do nothing about it now, her ma’s dead,” was the answer.